NIWA TROPOSPHERIC PHYSICS AND CHEMISTRY GROUP FIELD RESEARCH DATASET.

FILE
====
CN9902.csv 16-May-1999 22:56

FORMAT
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comma separated ascii

AUTHORSHIP
==========
These data were collected and processed by Mike Harvey. They are made available to participants of SOIREE99 without liability for use in scientific research only. Before using these data in any printed publication, please contact the author. Queries regarding the data, sampling and measurement techniques, and interpretation should be directed to:

Dr Mike Harvey...........e-mail: m.harvey@niwa.cri.nz
NIWA.................. ........phone: +64 +4 386 0300
PO Box 14-901............fax:.. +64 +4 386 2153
Kilbirnie
WELLINGTON
New Zealand

DATA ACQUISITION
================
Instrument: TSI 3010 Condensation Particle Counter. The measurement is the total condensation nucleus concentration for particles > around 10 nm diameter.
Period: 5/2/1999 06:22 to 28/2/99 20:13
Location: On board RV Tangaroa during Southern Ocean Iron Enrichment Experiment.
Data frequency: 1 sample every 108s
Sample inlet: Line run from roof of crow's nest above bridge.

FIELDS
======
The files contain the following fields (in 1 row per sample):
Time_UTC
CN_per_cm3

NOTES
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The CN concentration in diesel exhaust is large. A primary use for this measurement is as an indicator of sampling contaminated air. The main exhaust outlets on Tangaroa are located high on the fantail. A wind from the stern can carry the exhaust plume forward over the crow's nest sample inlet. Baseline (unpolluted) CN values are typically <= 200 cm^-3 at the SOIREE site. Grossly contaminated air has CN > 10,000 cm^-3.

REFERENCES
==========
Nil